Methods and apparatus, including computer program products, are provided for a filtering coil. In some example embodiments, there may be provided an apparatus. The apparatus may include a connector mated to enable coupling to a user equipment; and an air-core inductive coil coupled to the connector, wherein the air-core inductive coil includes at least one coil configured to attenuate a radio frequency signal emanating from the user equipment and pass at least direct current power signal to the connector.